These DB-IDs can be used in your query urls: e.g. NCBI_GENE__ID
| DB-ID | Description |
| ACEDB__ID | AceDB, genome database (ID) |
| ACEVIEW_WORMGENE__SYM | AceView/Wormgenes |
| ECOLI_GENOME_PROJECT__ID | E.coli Genome Project (ID) |
| ENZYME_COMMISSION__EC | Enzyme Commission number (EC number) |
| EUGENES__GN_ID | euGenes (GN ID) |
| FLYBASE__FBAN | FlyBase (FBAN ID) |
| FLYBASE__FBGN | FlyBase (FBGN ID) |
| GDB__ID | Genome Database (GDB ID) |
| GENE_ONTOLOGY__ID | Gene Ontology |
| HGNC__ID | HUGO Gene Nomenclature Comittee |
| INTACT__ID | IntAct (ID) |
| INTERPRO__ID | InterPro (ID) |
| MGI__ID | Mouse Genome Informatics |
| NCBI_DBSNP__ID | NCBI dbSNP |
| NCBI_GENBANK | NCBI, GenBank |
| NCBI_GENBANK__AC | NCBI, GenBank (Accession number) |
| NCBI_GENBANK__GI | NCBI, GenBank (Gene Identifier) |
| NCBI_GENE__ID | NCBI, Gene ID |
| NCBI_OMIM__MIM | Online Mendelian Inheritance in Man (MIM) |
| NCBI_PUBMED__PMID | NCBI, PubMed (PMID) |
| NCBI_PUBMED__UI | NCBI, PubMed (UI) |
| NCBI_REFSEQ__NM | NCBI, RefSeq NM (Mature mRNA) |
| NCBI_REFSEQ__NP | NCBI, RefSeq NP (Protein Product) |
| NCBI_UNIGENE__ID | NCBI, UniGene (ID) |
| PFAM__ID | Pfam, database of protein domains (ID) |
| PIR__ID | Protein Information Resource (ID) |
| PRODOM__ID | PRODOM (ID) |
| PROSITE__ID | PROSITE, Database of protein families and domains (ID) |
| PROTEIN_DATABANK__PDB_ID | Protein Data Bank (PDB) |
| RAT_GENOME_DATABASE__ID | Rat genome database (Object ID) |
| SC_SYSTEMATIC_NAME | Saccharomyces Systematic Gene Name |
| SCOP__ID | Structural Classification of Proteins (ID) |
| SGD__SGDID | Saccharomyces Genome Database (SGD ID) |
| TAIR__GENE_ID | The Arabidopsis Information Resource (GENE_ID) |
| TREMBL__AC | TrEMBL (AC) |
| UNIPROT__AC | UniProt (AC) |
| UNIPUB_ID | UniPub (Document Id) |
| WORMBASE__GENE_ID | WormBase (GENE_ID) |
| WORMBASE__PROTEIN_ID | WormBase (PROTEIN_ID) |
| ZDB__GENE_ID | Zebrafish Database (GENE_ID) |
